package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.entity.Employee;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service

public class CategoryServiceImpl implements CategoryService {

    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    /*
     * 分类分页查询
     * @param categoryPageQueryDTO
     * @return
     * */
    @Override
    public PageResult page(CategoryPageQueryDTO categoryPageQueryDTO) {
//        调用分页
        PageHelper.startPage(categoryPageQueryDTO.getPage(),categoryPageQueryDTO.getPageSize());

//        调用sql
        Page<Category> result = categoryMapper.pageQuery(categoryPageQueryDTO);

//        封装数据
        PageResult pageResult = new PageResult(result.getTotal(), result.getResult());
        return pageResult;
    }


    /*
     * 新增分类
     * @param categoryDTO
     * @return
     * */
    @Override
    public void save(CategoryDTO categoryDTO) {
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO,category);
//        设置状态
        category.setStatus(StatusConstant.DISABLE);
/*//        设置创建时间
        category.setCreateTime(LocalDateTime.now());
//        设置更改时间
        category.setUpdateTime(LocalDateTime.now());
//        设置创建人
        category.setCreateUser(BaseContext.getCurrentId());
//        设置更改人
        category.setUpdateUser(BaseContext.getCurrentId());*/

        categoryMapper.save(category);
    }


    /*
     * 修改分类
     * @param categoryDTO
     * @return
     * */
    @Override
    public void update(CategoryDTO categoryDTO) {
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO,category);

/*//        设置修改人
        category.setUpdateUser(BaseContext.getCurrentId());
//        设置修改时间
        category.setUpdateTime(LocalDateTime.now());*/

        categoryMapper.update(category);
    }

    /*
     * 禁用、启用分类
     * @param status
     * @param id
     * @return
     * */
    @Override
    public void startOrStop(Integer status, Long id) {
        Category build = Category.builder().id(id).status(status).build();
        categoryMapper.update(build);
    }


    /*
     * 删除分类
     * @param id
     * @return
     * */
    @Override
    public void deleteById(Long id) {
        //查询当前分类是否关联了菜品，如果关联了就抛出业务异常
        Integer count = dishMapper.countByCategoryId(id);
        if(count > 0){
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }

        //查询当前分类是否关联了套餐，如果关联了就抛出业务异常
        count = setmealMapper.countByCategoryId(id);
        if(count > 0){
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }
        categoryMapper.delete(id);
    }


    /*
     * 根据类型查询分类
     * @param type
     * @return
     * */
    @Override
    public List<Category> list(Integer type) {
        List<Category> categoryList= categoryMapper.list(type);
        return categoryList;
    }
}
